/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.fu.kofu.webmvc

import org.springframework.context.support.GenericApplicationContext
import org.springframework.context.support.registerBean
import org.springframework.fu.kofu.web.AbstractCorsDsl
import org.springframework.web.cors.CorsConfiguration
import org.springframework.web.cors.UrlBasedCorsConfigurationSource
import org.springframework.web.filter.CorsFilter

/**
 * Kofu DSL for WebMvc CORS configuration.
 *
 * @author Sebastien Deleuze
 */
class WebMvcCorsDsl(
	defaults: Boolean = true,
	private val init: AbstractCorsDsl.() -> Unit
) : AbstractCorsDsl(defaults) {

	private val source = UrlBasedCorsConfigurationSource()

	override fun registerCorsConfiguration(path: String, configuration: CorsConfiguration) {
		source.registerCorsConfiguration(path, configuration)
	}

	override fun initialize(context: GenericApplicationContext) {
		super.initialize(context)
		init()
		context.registerBean("corsFilter") {
			CorsFilter(source)
		}
	}
}

/**
 * Configure CORS via a [dedicated DSL][AbstractCorsDsl].
 *
 * Exact path mapping URIs (such as `/admin`) are supported
 * as well as Ant-style path patterns.
 *
 * @param defaults Apply permit default values when set to true (enabled by default)
 * @param dsl Cors DSL
 * @sample org.springframework.fu.kofu.samples.corsDsl
 */
fun WebMvcServerDsl.cors(defaults: Boolean = true,
						 dsl: AbstractCorsDsl.() -> Unit = {}) {
	WebMvcCorsDsl(defaults, dsl).initialize(context)
}

